Exploring the Neuromodulatory Effects of the Vertebral Subluxation and Chiropractic Care

The elusive vertebral subluxation is the central defining clinical principle of the chiropractic profession. After almost 115 years of discussion there is still little consensus regarding the nature of the vertebral subluxation or its potential associated neurological manifestations. Some authors even deny that the subluxation exists. In this paper a model is presented that assumes that the putative vertebral subluxation represents a state of altered afferent input which is responsible for ongoing maladaptive central plastic changes that over time can lead to dysfunction, pain and other symptoms. A growing body of research that investigates the neuromodulatory effects of chiropractic care supports this model. This paper explores this research and discusses it in light of the vitalistic principles upon which chiropractic was founded. The model outlined in this paper may go some way to explain some of the beneficial effects of chiropractic care on nonmusculoskeletal conditions previously reported in the literature.